Javascript Detect Adblock

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Do you want to stop Adblock from blocking your Google Adsense Ads and hurting your revenue? Here is a simple javascript script that detects if Adblock or another Ad blocker is blocking your Google Adsense ads or ads from another ad network. It will then display your own local ads. You could put a local image with a link to an Amazon product or your could politely ask your users to turn off the adblocker or whatever you want to do.


  • Detect Adblock or other ad blocker
  • Display your own local ad
  • Customize to work with other ad networks


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How To Use

After downloading edit the following variables in the javascript file:

	var your_class = "sra_div"; // Put the class name of the div elements that contain your local ads here
	var other_class = "adsbygoogle"; // Put the class name of the ad network elements here. Use "adsbygoogle" for Adsense

Add the following code to you html page:

<script type="text/javascript" src="block_detect.js">


8/9/2021 - Version 1.2c - Removed some code that was causing Google Adsense full screen vignette ads to display without being able to close them.

4/17/2018 - Version 1.2b - Removing adsbygoogle in version 1.2 caused the script to display your_ads even though google ads were loading. Fixed by putting || (typeof adsbygoogle != "undefined" && typeof adsbygoogle.loaded != "undefined")

4/16/2018 - Version 1.2 - Removed || (adsbygoogle && adsbygoogle.loaded) to prevent error: Uncaught ReferenceError: adsbygoogle is not defined on line 27.

2/21/2018 - Verison 1.1 - Previously the div element that contains the ad that was being blocked was not being set to display="none". In a few mobile browsers this caused a blank space to be visible. Fixed by using display="none".

2/19/2018 - Version 1.0 - Javascript Detect Adblock created

Last updated on August 10, 2021
Created on February 19, 2018

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